666272719 has 16 divisors (see below), whose sum is σ = 768595968. Its totient is φ = 565759872.

The previous prime is 666272693. The next prime is 666272729. The reversal of 666272719 is 917272666.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666272719 is a prime.

It is a super-3 number, since 3×666272719³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666272729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428247 + ... + 429799.

It is an arithmetic number, because the mean of its divisors is an integer number (48037248).

Almost surely, 2^666272719 is an apocalyptic number.

666272719 is a deficient number, since it is larger than the sum of its proper divisors (102323249).

666272719 is a wasteful number, since it uses less digits than its factorization.

666272719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094.

The product of its digits is 381024, while the sum is 46.

The square root of 666272719 is about 25812.2590836215. The cubic root of 666272719 is about 873.4083583385.

The spelling of 666272719 in words is "six hundred sixty-six million, two hundred seventy-two thousand, seven hundred nineteen".